Justin Bieber has unfollowed Usher - once described as a close friend and mentor to the Canadian - on Instagram, perhaps suggesting a souring of relations between the stars, both of whom were formerly

Almost two decades on, Justin appears to have quietly cut ties with his former mentor Usher, 46, so we look back on their close 17-year friendship. Usher didn’t discover Justin but he was there early on in the Yummy singer’s career, having been brought on board immediately by Scooter.

Justin Bieber's social media activity has given internet users much to speculate. After the pop sensation unfollowed key figures in his life, including Scooter Braun, Usher, and his father-in-law, many are questioning why he has still not severed ties with Diddy amid the ongoing allegations against the rapper.